146188809 has 12 divisors (see below), whose sum is σ = 227404996. Its totient is φ = 89962272.

The previous prime is 146188781. The next prime is 146188829. The reversal of 146188809 is 908881641.

It can be written as a sum of positive squares in 2 ways, for example, as 16160400 + 130028409 = 4020^2 + 11403^2 .

It is not a de Polignac number, because 146188809 - 2¹⁶ = 146123273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (146188829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 624622 + ... + 624855.

Almost surely, 2^146188809 is an apocalyptic number.

It is an amenable number.

146188809 is a deficient number, since it is larger than the sum of its proper divisors (81216187).

146188809 is a wasteful number, since it uses less digits than its factorization.

146188809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249496 (or 1249493 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 146188809 is about 12090.8564212797. The cubic root of 146188809 is about 526.7906312816.

The spelling of 146188809 in words is "one hundred forty-six million, one hundred eighty-eight thousand, eight hundred nine".